← All owner tools · Decode your own SPID label with the GM RPO decoder
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| 001 | P RAT, M RATIO, 3.70 | 1991 | GM sourced |
| 001 | Rat, M Ratio, 3.70 | 1991 | GM dated |
| 002 | P RAT, M RATIO, 4.11 (4 1/9) | 1991 | GM sourced |
| 002 | Rat, M Ratio, 4.11 (4 1/9) | 1991 | GM dated |
| 003 | Rat, M Ratio, 4.33 | 1991 | GM dated |
| 003 | P RAT, M RATIO, 4.33 | 1991 | GM sourced |
| 004 | Rat, M Ratio, 4.78 | 1994 | GM dated |
| 004 | P RAT, M RATIO, 4.78 | 1994 | GM sourced |
| 005 | Rat, M Ratio, 4.56 (4 5/9) | 1991 | GM dated |
| 005 | P RAT, M RATIO, 4.56 (4 5/9) | 1991 | GM sourced |
| 006 | Rat, M Ratio, 4.63 (4 5/8) | 1996 | GM dated |
| 006 | P RAT, M RATIO, 4.63 (4 5/8) | 1996 | GM sourced |
| 007 | Rat, M Ratio, 3.07 | 1997 | GM dated |
| 007 | P RAT, M RATIO, 3.07 | 1997 | GM sourced |
| 008 | Rat, M Ratio, 4.88 | 1996 | GM dated |
| 008 | P RAT, M RATIO, 4.88 | 1996 | GM sourced |
| 009 | Rat, M Ratio, 5.29 | 1991 | GM dated |
| 009 | P RAT, M RATIO, 5.29 | 1991 | GM sourced |
| 00A | Spare wheel upgrade Chevrolet Silverado 1500 | 2022–2023 | GM sourced |
| 00A | Wheel Spare 17 X 8.0, J, Steel, Design 2 | — | Reference |
| 00D | Not Equipped with Climate Control Knob Digital Temperature Display Chevrolet Silverado 1500 | 2022 | Provisional |
| 00G | Not Equipped with Heated Steering Wheel, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00L | Ccl, R Secondary Color, Exterior, Prime | 1989 | GM dated |
| 00L | P CCL, R SECONDARY COLOR, EXTERIOR, PRIME | 1989 | GM sourced |
| 00L | Exterior Color,secondary,prime,union City Body | — | GM dated |
| 00R | Not Equipped with Heated Rear Outboard Seats, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00U | Ccu, M Primary Color, Exterior, Prime | 1989 | GM dated |
| 00U | P CCU, M PRIMARY COLOR, EXTERIOR, PRIME | 1989 | GM sourced |
| 00U | Exterior Color,primary,prime,upper,union City Body | — | GM dated |
| 00V | Not Equipped with Heated or Ventilated Front Seats, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00Y | Not Equipped with Rear Park Assist, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00Z | Not Equipped with Front and Rear Park Assist, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 010 | Rat, M Ratio, 5.43 | 1991 | GM dated |
| 010 | P RAT, M RATIO, 5.43 | 1991 | GM sourced |
| 011 | Rat, M Ratio, 5.57 (5 4/7) | 1991 | GM dated |
| 011 | P RAT, M RATIO, 5.57 (5 4/7) | 1991 | GM sourced |
| 012 | Rat, M Ratio, 5.83 | 1991 | GM dated |
| 012 | P RAT, M RATIO, 5.83 | 1991 | GM sourced |
| 013 | Rat, M Ratio, 3.73 | 1995 | GM dated |
| 013 | P RAT, M RATIO, 3.73 | 1995 | GM sourced |
| 014 | Rat, M Ratio, 6.14 (6 1/7) | 1991 | GM dated |
| 014 | P RAT, M RATIO, 6.14 (6 1/7) | 1991 | GM sourced |
| 015 | Rat, M Ratio, 6.17 | 1991 | GM dated |
| 015 | P RAT, M RATIO, 6.17 | 1991 | GM sourced |
| 016 | Rat, M Ratio, 5.25 | 1991 | GM dated |
| 016 | P RAT, M RATIO, 5.25 | 1991 | GM sourced |
| 017 | Rat, M Ratio, 6.50 | 1991 | GM dated |
| 017 | P RAT, M RATIO, 6.50 | 1991 | GM sourced |
| 018 | Rat, M Ratio, 6.65 | 1989 | GM dated |
| 018 | P RAT, M RATIO, 6.65 | 1989 | GM sourced |
| 019 | Rat, M Ratio, 6.67 | 1989 | GM dated |
| 019 | P RAT, M RATIO, 6.67 | 1989 | GM sourced |
| 01A | Stc, R Stripe Color, Accent, Two Tone, Silver/gunmetal (1995) | 1998 | GM dated |
| 01A | P STC, R STRIPE COLOR, ACCENT, TWO TONE, SILVER/GUNMETAL (1995) | 1998 | GM sourced |
| 01A | Stripe Color Accent, Two Tone, Silver/gunmetal | — | GM dated |
| 01A | Trim Color Seat Jet Black | — | GM dated |
| 01B | Trim Color Seat LT Neutral | — | Reference |
| 01C | Trim Color Seat LT Titanium | — | Reference |
| 01D | Trim Color Seat LT Cashmere | — | Reference |
| 01E | Trim Color Seat DK Titanium | — | Reference |
The full list, A to Z
Showing 1–100 of 302 codes beginning with 4. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| 40A | P, STC, R, STRIPE COLOR, ACCENT, WHITE (91) | 1989 | GM sourced |
| 40B | Trim Combination Cloth, Shale/cocoa (b) (07) | — | Reference |
| 40I | Interior Trim Cocoa/shale | — | Reference |
| 40L | P, CCL, R, SECONDARY COLOR, EXTERIOR, WHITE (96) this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| 40P | P, WHC, R, WHEEL COLOR, WHITE (91) this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| 40Q | P, MCI, R, MOLDING COLOR, WHITE (91) | 1989 | GM sourced |
| 40T | P, VRC, R, TOP COLOR, WHITE (91) | 1989 | GM sourced |
| 40U | P, CCU, M, PRIMARY COLOR, EXTERIOR, WHITE (02), 20419 this code has more than one documented meaning — filter by year | — | GM sourced |
| 40V | Primary Color Ext,frost Green Met(gmdat) | — | Reference |
| 40X | P, TLV, R, TRIM COLOR SEAT, COLOR GREEN (OPEL) | 1999 | GM sourced |
| 40Y | P, TDP, R, TRIM COLOR DR PANEL, GREEN (OPEL), 315 | — | Provisional |
| 41A | P, STC, R, STRIPE COLOR, ACCENT, BLACK (91) this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| 41D | TRIM COMBINATION, CLOTH, DK RED (D) (91) | — | Provisional |
| 41I | Interior Trim Very Light Linen/cocoa (i) (08) | — | Reference |
| 41L | P, CCL, R, SECONDARY COLOR, EXTERIOR, KRYPTON GREEN MICA (99) OPEL this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 41P | P, WHC, R, WHEEL COLOR, BLACK (91) this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| 41Q | P, MCI, R, MOLDING COLOR, BLACK (91) | 1989 | GM sourced |
| 41T | P, VRC, R, TOP COLOR, BLACK (96) | 1996 | GM sourced |
| 41U | P, CCU, M, PRIMARY COLOR, EXTERIOR, BLACK (02), 20419 this code has more than one documented meaning — filter by year | — | GM sourced |
| 422 | P, TRM, M, TRIM COMBINATION, LEATHER, CRYSTAL GREEN (2) (96) | 1993 | GM sourced |
| 423 | P, TRM, M, TRIM COMBINATION, LEATHER, CRYSTAL GREEN (3) (96) | 1993 | Provisional |
| 424 | P, TRM, M, TRIM COMBINATION, LEATHER, MED CRYSTAL GREEN (4) (98) | 1995 | GM sourced |
| 425 | P, TRM, M, TRIM COMBINATION, LEATHER, CRYSTAL GREEN (5) (96) | 1993 | Provisional |
| 426 | P, TRM, M, TRIM COMBINATION, LEATHER, CRYSTAL GREEN (6) (97) | 1995 | Provisional |
| 42A | P, STC, R, STRIPE COLOR, ACCENT, MOCHA (94) this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| 42B | P, TRM, M, TRIM COMBINATION, CLOTH, GREEN/BLUE (B) (ARENA 98) | 1997 | GM sourced |
| 42C | Trim Combination,cloth,med Grayfern | — | Reference |
| 42D | P, TRM, M, TRIM COMBINATION, CLOTH, CRYSTAL GREEN (D) (96) this code has more than one documented meaning — filter by year | 1993 | GM sourced |
| 42E | Trim Combination,cloth,med Grayfern | — | Reference |
| 42F | P, FMT, R, COVERING COLOR, FLOOR MAT, CRYSTAL GREEN (96) | 1993 | GM sourced |
| 42G | Trim Comb-med DK Gray (cloth) (with Turquoise Accents) | — | Reference |
| 42H | Trim Comb - Black (cloth) (w/turquoise Accents) | — | Reference |
| 42I | P, CCM, M, INTERIOR TRIM, GREEN/BLUE (ARENA 98) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 42L | P, CCL, R, SECONDARY COLOR, EXTERIOR, MOSS GREEN MT (00) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 42N | P, TRM, M, TRIM COMBINATION, VINYL, GREEN/BLUE (N) (ARENA 98) | 1997 | Provisional |
| 42P | Wheel Color Turquoise Met (91) | — | Reference |
| 42Q | P, MCI, R, MOLDING COLOR, EXTERIOR, MED SEA GREEN MET (96) | 1994 | GM sourced |
| 42U | P, CCU, M, PRIMARY COLOR, EXTERIOR, CYPRESS GREEN MET (02) (OPEL), 20419 E, 0 this code has more than one documented meaning — filter by year | — | GM sourced |
| 432 | P, TRM, M, TRIM COMBINATION, LEATHER, MOSS GREEN (00) | 1997 | Provisional |
| 43A | P, STC, R, STRIPE COLOR, ACCENT, EMERALD GREEN (97) this code has more than one documented meaning — filter by year | 1995 | GM sourced |
| 43B | P, TRM, M, TRIM COMBINATION, CLOTH, MOSS GREEN (00) | 1997 | GM sourced |
| 43C | Trim Combination,cloth,med Sage | — | Reference |
| 43D | P, TRM, M, TRIM COMBINATION, CLOTH, HOTHOUSE GREEN (D) (03), 10404 E, 8 | — | GM sourced |
| 43E | Trim Combination,cloth,med Sage | — | Reference |
| 43G | Trim Combination,cloth,med Sage | — | Reference |
| 43H | Trim Combination,cloth,med Sage | — | Reference |
| 43I | P, CCM, M, INTERIOR TRIM, BRIGHT AQUA (95) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 43L | P, CCL, R, SECONDARY COLOR, EXTERIOR, YELLOW (02) this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| 43N | Interior Trim Choccachino/jet Black this code has more than one documented meaning — filter by year | — | Reference |
| 43P | P, WHC, R, WHEEL COLOR, BRIGHT AQUA (92) | 1997 | GM sourced |
| 43Q | P, MCI, R, MOLDING COLOR, MED AQUA MET (91) | 1989 | GM sourced |
| 43T | Top Color Convertible, Bordeaux | — | Reference |
| 43U | P, CCU, M, PRIMARY COLOR, EXTERIOR, YELLOW (02) this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| 43X | P, TLV, R, TRIM COLOR SEAT, COLOR MOSS GREEN (OPEL), 10510 E, 0 | — | Provisional |
| 43Y | P, TDP, R, TRIM COLOR DR PANEL, MOSS GREEN (OPEL), 10510 E, 0 | — | Provisional |
| 442 | P, TRM, M, TRIM COMBINATION, LEATHER, DK GRAY (2) (FRONTERA) | 1997 | Provisional |
| 44A | P, STC, R, STRIPE COLOR, ACCENT, GREEN MET (93) this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| 44B | P, TRM, M, TRIM COMBINATION, CLOTH, BRIGHT AQUA (B) (94) | 1997 | GM sourced |
| 44C | P, TRM, M, TRIM COMBINATION, CLOTH, BRIGHT AQUA (C) (94) | 1997 | GM sourced |
| 44D | P, TRM, M, TRIM COMBINATION, CLOTH, BRIGHT AQUA (D) | 1997 | Provisional |
| 44F | Steering Wheel Color Choco Sapele | — | Reference |
| 44I | P, CCM, M, INTERIOR TRIM, BRIGHT AQUA (94) | 1997 | GM sourced |
| 44L | Secondary Color, Exterior, Forest Green (99) Opel this code has more than one documented meaning — filter by year | 1998 | GM dated |
| 44Q | P, MCI, R, MOLDING COLOR, MED RED MET (00) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 44U | P, CCU, M, PRIMARY COLOR, EXTERIOR, MED RED MET (02), 20419 E, 4 this code has more than one documented meaning — filter by year | — | GM sourced |
| 44V | Exterior Color,primary,khaki Green(gmdat) | — | Reference |
| 459 | P, BLT, M, SEAT BELT COLOR, PANORAMA BLUE (03), 20320 E, 0 | — | Provisional |
| 45A | P, STC, R, STRIPE COLOR, ACCENT, BRIGHT TEAL (92) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 45I | P, CCM, M, INTERIOR TRIM, BROWN, OPEL (03), 10607 | — | Provisional |
| 45L | P, CCL, R, SECONDARY COLOR, EXTERIOR, CLASSIC GREEN MET OPEL (99) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 45P | P, WHC, R, WHEEL COLOR, MED GREEN MET (94) | 1993 | Provisional |
| 45Q | P, MCI, R, MOLDING COLOR, MED GREEN MET (94) | 1992 | GM sourced |
| 45T | P, VRC, R, TOP COLOR, GREEN (94) | 1993 | GM sourced |
| 45U | P, CCU, M, PRIMARY COLOR, EXTERIOR, GREEN MET (01), 20419 this code has more than one documented meaning — filter by year | — | GM sourced |
| 45X | P, TLV, R, TRIM COLOR SEAT, COLOR BROWN (OPEL) | 1999 | Provisional |
| 45Y | P, TDP, R, TRIM COLOR DR PANEL, BROWN, (OPEL) (03), 10607 | — | Provisional |
| 46A | Stripe Color, Accent, Two Tone, Green Met/dk Green Met (99) this code has more than one documented meaning — filter by year | 1996 | GM dated |
| 46C | Trim Combination Cloth, Onyx | — | Reference |
| 46L | P, CCL, R, SECONDARY COLOR, EXTERIOR, JUNGLE GREEN MICA OPEL (99) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 46U | P, CCU, M, PRIMARY COLOR, EXTERIOR, DK GREEN (02), 20419 this code has more than one documented meaning — filter by year | — | GM sourced |
| 472 | P, TRM, M, TRIM COMBINATION, LEATHER, DK RED (2) (91) | 1989 | GM sourced |
| 479 | P, BLT, M, SEAT BELT COLOR, SPEARMINT SILVER (03), 20320 E, 0 | — | Provisional |
| 47A | P, STC, R, STRIPE COLOR, ACCENT, LT SAND (94) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 47B | P, TRM, M, TRIM COMBINATION, CLOTH, DK RED (B) (91) this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| 47C | P, TRM, M, TRIM COMBINATION, CLOTH, DK RED (C) (91) this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| 47D | P, TRM, M, TRIM COMBINATION, CLOTH, DK RED (D) (91) this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| 47E | P, TRM, M, TRIM COMBINATION, CLOTH, DK RED (E) (91) this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| 47G | P, TRM, M, TRIM COMBINATION, CLOTH, DK RED (G) (91) this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| 47H | P, TRM, M, TRIM COMBINATION, CLOTH, DK RED (H) (91) this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| 47I | P, CCM, M, INTERIOR TRIM, DK RED (I) (91) this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| 47L | P, CCL, R, SECONDARY COLOR, EXTERIOR, GLENN GREEN TINTCOAT MET (99) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 47Q | P, MCI, R, MOLDING COLOR, MED DK LICHEN MET (96) this code has more than one documented meaning — filter by year | 1993 | GM sourced |
| 47T | P, VRC, R, TOP COLOR, MED DK LICHEN MET (96) | 1998 | GM sourced |
| 47U | P, CCU, M, PRIMARY COLOR, EXTERIOR, DK BLUE MET (02), 20419 this code has more than one documented meaning — filter by year | — | GM sourced |
| 47V | P, TRM, M, TRIM COMBINATION, VINYL, DK RED (V) (91) this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| 47W | P, TRM, M, TRIM COMBINATION, VINYL, DK RED (W) (91) this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| 482 | TRIM COMBINATION, LEATHER, MED EMERALD (2) | — | Provisional |
| 483 | TRIM COMBINATION, LEATHER, MED EMERALD (3) | — | Provisional |
| 484 | TRIM COMBINATION, LEATHER MED EMERALD (4) | — | Provisional |
| 48A | P, STC, R, STRIPE COLOR, ACCENT, NEUTRAL (96) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
Using the master list
This is the full GM RPO code list we hold — every Regular Production Option code in the database, searchable by code or by description and filterable to a single model year. Most RPO lists on the internet run to a couple of hundred codes copied from one service manual. This one holds 24,366, and tells you where each meaning came from.
What an RPO code is
RPO stands for Regular Production Option. Every piece of factory equipment on a GM vehicle carries a three-character code, and the ones fitted to your truck are printed on the Service Parts Identification label in the glove box or on the door jamb. G80 is a locking differential, Z71 is an off-road suspension package, K05 is a block heater.
They matter because they are what the factory actually built, not what a listing claims. If you are buying a truck, the label settles the argument. If you are ordering parts, the axle and transmission codes decide which part fits.
Why the same code means different things
GM has reused these codes for decades and across every division. A code that means one thing on a 1978 pickup can mean something unrelated on a 2015 SUV, and plenty of entries in circulation come from bulk listings with no year and no document behind them.
So every entry here is labelled with where it came from. GM sourced means we hold an actual GM document for it. GM dated means it comes from the option master with a date attached. Reference means it is in general circulation with nothing dated behind it — still useful, but treat it as a lead rather than a fact. Filtering by your model year is the single best way to get an answer you can rely on.
Read the codes off your own label
If you have the sticker in front of you, the RPO decoder will read a photo of it and decode every code at once, checked against your model year.
FullSizeChevy.com is not affiliated with, endorsed by, or sponsored by General Motors. Chevrolet, GMC, Cadillac, Silverado, Sierra and related marks are trademarks of General Motors LLC and are used here only to identify applicable vehicles. RPO meanings vary by model year, platform and configuration — verify against your own label before buying parts.